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42e9a92f RL |
1 | /* |
2 | * Copyright(c) 2007 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms and conditions of the GNU General Public License, | |
6 | * version 2, as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope it will be useful, but WITHOUT | |
9 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
10 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
11 | * more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public License along with | |
14 | * this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
16 | * | |
17 | * Maintained at www.Open-FCoE.org | |
18 | */ | |
19 | ||
20 | #ifndef _LIBFC_H_ | |
21 | #define _LIBFC_H_ | |
22 | ||
23 | #include <linux/timer.h> | |
24 | #include <linux/if.h> | |
582b45bc | 25 | #include <linux/percpu.h> |
42e9a92f RL |
26 | |
27 | #include <scsi/scsi_transport.h> | |
28 | #include <scsi/scsi_transport_fc.h> | |
a51ab396 | 29 | #include <scsi/scsi_bsg_fc.h> |
42e9a92f RL |
30 | |
31 | #include <scsi/fc/fc_fcp.h> | |
32 | #include <scsi/fc/fc_ns.h> | |
d78c317f | 33 | #include <scsi/fc/fc_ms.h> |
42e9a92f RL |
34 | #include <scsi/fc/fc_els.h> |
35 | #include <scsi/fc/fc_gs.h> | |
36 | ||
37 | #include <scsi/fc_frame.h> | |
38 | ||
96ad8464 JE |
39 | #define FC_FC4_PROV_SIZE (FC_TYPE_FCP + 1) /* size of tables */ |
40 | ||
42e9a92f RL |
41 | /* |
42 | * libfc error codes | |
43 | */ | |
44 | #define FC_NO_ERR 0 /* no error */ | |
45 | #define FC_EX_TIMEOUT 1 /* Exchange timeout */ | |
46 | #define FC_EX_CLOSED 2 /* Exchange closed */ | |
9f9504a7 HR |
47 | #define FC_EX_ALLOC_ERR 3 /* Exchange allocation failed */ |
48 | #define FC_EX_XMIT_ERR 4 /* Exchange transmit failed */ | |
49 | #define FC_EX_ELS_RJT 5 /* ELS rejected */ | |
50 | #define FC_EX_INV_LOGIN 6 /* Login not completed */ | |
51 | #define FC_EX_SEQ_ERR 6 /* Exchange sequence error */ | |
42e9a92f | 52 | |
3a3b42bf RL |
53 | /** |
54 | * enum fc_lport_state - Local port states | |
55 | * @LPORT_ST_DISABLED: Disabled | |
56 | * @LPORT_ST_FLOGI: Fabric login (FLOGI) sent | |
57 | * @LPORT_ST_DNS: Waiting for name server remote port to become ready | |
58 | * @LPORT_ST_RPN_ID: Register port name by ID (RPN_ID) sent | |
59 | * @LPORT_ST_RFT_ID: Register Fibre Channel types by ID (RFT_ID) sent | |
ab593b18 | 60 | * @LPORT_ST_RFF_ID: Register FC-4 Features by ID (RFF_ID) sent |
d78c317f NP |
61 | * @LPORT_ST_FDMI: Waiting for mgmt server rport to become ready |
62 | * @LPORT_ST_RHBA: | |
3a3b42bf RL |
63 | * @LPORT_ST_SCR: State Change Register (SCR) sent |
64 | * @LPORT_ST_READY: Ready for use | |
65 | * @LPORT_ST_LOGO: Local port logout (LOGO) sent | |
66 | * @LPORT_ST_RESET: Local port reset | |
42e9a92f | 67 | */ |
42e9a92f | 68 | enum fc_lport_state { |
b1d9fd55 | 69 | LPORT_ST_DISABLED = 0, |
42e9a92f RL |
70 | LPORT_ST_FLOGI, |
71 | LPORT_ST_DNS, | |
c9c7bd7a | 72 | LPORT_ST_RNN_ID, |
5baa17c3 | 73 | LPORT_ST_RSNN_NN, |
c9866a54 | 74 | LPORT_ST_RSPN_ID, |
42e9a92f | 75 | LPORT_ST_RFT_ID, |
ab593b18 | 76 | LPORT_ST_RFF_ID, |
d78c317f NP |
77 | LPORT_ST_FDMI, |
78 | LPORT_ST_RHBA, | |
79 | LPORT_ST_RPA, | |
80 | LPORT_ST_DHBA, | |
81 | LPORT_ST_DPRT, | |
42e9a92f RL |
82 | LPORT_ST_SCR, |
83 | LPORT_ST_READY, | |
84 | LPORT_ST_LOGO, | |
85 | LPORT_ST_RESET | |
86 | }; | |
87 | ||
88 | enum fc_disc_event { | |
89 | DISC_EV_NONE = 0, | |
90 | DISC_EV_SUCCESS, | |
91 | DISC_EV_FAILED | |
92 | }; | |
93 | ||
3a3b42bf RL |
94 | /** |
95 | * enum fc_rport_state - Remote port states | |
96 | * @RPORT_ST_INIT: Initialized | |
a7b12a27 JE |
97 | * @RPORT_ST_FLOGI: Waiting for FLOGI completion for point-to-multipoint |
98 | * @RPORT_ST_PLOGI_WAIT: Waiting for peer to login for point-to-multipoint | |
3a3b42bf RL |
99 | * @RPORT_ST_PLOGI: Waiting for PLOGI completion |
100 | * @RPORT_ST_PRLI: Waiting for PRLI completion | |
101 | * @RPORT_ST_RTV: Waiting for RTV completion | |
102 | * @RPORT_ST_READY: Ready for use | |
3a3b42bf RL |
103 | * @RPORT_ST_ADISC: Discover Address sent |
104 | * @RPORT_ST_DELETE: Remote port being deleted | |
3a3b42bf | 105 | */ |
42e9a92f | 106 | enum fc_rport_state { |
3a3b42bf | 107 | RPORT_ST_INIT, |
a7b12a27 JE |
108 | RPORT_ST_FLOGI, |
109 | RPORT_ST_PLOGI_WAIT, | |
3a3b42bf RL |
110 | RPORT_ST_PLOGI, |
111 | RPORT_ST_PRLI, | |
112 | RPORT_ST_RTV, | |
113 | RPORT_ST_READY, | |
3a3b42bf RL |
114 | RPORT_ST_ADISC, |
115 | RPORT_ST_DELETE, | |
42e9a92f RL |
116 | }; |
117 | ||
42e9a92f RL |
118 | /** |
119 | * struct fc_disc_port - temporary discovery port to hold rport identifiers | |
9737e6a7 RL |
120 | * @lp: Fibre Channel host port instance |
121 | * @peers: Node for list management during discovery and RSCN processing | |
122 | * @rport_work: Work struct for starting the rport state machine | |
123 | * @port_id: Port ID of the discovered port | |
42e9a92f RL |
124 | */ |
125 | struct fc_disc_port { | |
3a3b42bf RL |
126 | struct fc_lport *lp; |
127 | struct list_head peers; | |
128 | struct work_struct rport_work; | |
129 | u32 port_id; | |
42e9a92f RL |
130 | }; |
131 | ||
3a3b42bf RL |
132 | /** |
133 | * enum fc_rport_event - Remote port events | |
134 | * @RPORT_EV_NONE: No event | |
135 | * @RPORT_EV_READY: Remote port is ready for use | |
136 | * @RPORT_EV_FAILED: State machine failed, remote port is not ready | |
137 | * @RPORT_EV_STOP: Remote port has been stopped | |
138 | * @RPORT_EV_LOGO: Remote port logout (LOGO) sent | |
139 | */ | |
42e9a92f RL |
140 | enum fc_rport_event { |
141 | RPORT_EV_NONE = 0, | |
4c0f62b5 | 142 | RPORT_EV_READY, |
42e9a92f RL |
143 | RPORT_EV_FAILED, |
144 | RPORT_EV_STOP, | |
145 | RPORT_EV_LOGO | |
146 | }; | |
147 | ||
9fb9d328 JE |
148 | struct fc_rport_priv; |
149 | ||
3a3b42bf RL |
150 | /** |
151 | * struct fc_rport_operations - Operations for a remote port | |
152 | * @event_callback: Function to be called for remote port events | |
153 | */ | |
42e9a92f | 154 | struct fc_rport_operations { |
9fb9d328 | 155 | void (*event_callback)(struct fc_lport *, struct fc_rport_priv *, |
42e9a92f RL |
156 | enum fc_rport_event); |
157 | }; | |
158 | ||
159 | /** | |
160 | * struct fc_rport_libfc_priv - libfc internal information about a remote port | |
3a3b42bf RL |
161 | * @local_port: The associated local port |
162 | * @rp_state: Indicates READY for I/O or DELETE when blocked | |
163 | * @flags: REC and RETRY supported flags | |
164 | * @e_d_tov: Error detect timeout value (in msec) | |
165 | * @r_a_tov: Resource allocation timeout value (in msec) | |
9e9d0452 JE |
166 | */ |
167 | struct fc_rport_libfc_priv { | |
168 | struct fc_lport *local_port; | |
169 | enum fc_rport_state rp_state; | |
170 | u16 flags; | |
171 | #define FC_RP_FLAGS_REC_SUPPORTED (1 << 0) | |
172 | #define FC_RP_FLAGS_RETRY (1 << 1) | |
4b2164d4 | 173 | #define FC_RP_STARTED (1 << 2) |
75a2792d | 174 | #define FC_RP_FLAGS_CONF_REQ (1 << 3) |
9e9d0452 JE |
175 | unsigned int e_d_tov; |
176 | unsigned int r_a_tov; | |
177 | }; | |
178 | ||
179 | /** | |
3a3b42bf RL |
180 | * struct fc_rport_priv - libfc remote port and discovery info |
181 | * @local_port: The associated local port | |
182 | * @rport: The FC transport remote port | |
183 | * @kref: Reference counter | |
184 | * @rp_state: Enumeration that tracks progress of PLOGI, PRLI, | |
185 | * and RTV exchanges | |
186 | * @ids: The remote port identifiers and roles | |
4b2164d4 | 187 | * @flags: STARTED, REC and RETRY_SUPPORTED flags |
3a3b42bf RL |
188 | * @max_seq: Maximum number of concurrent sequences |
189 | * @disc_id: The discovery identifier | |
190 | * @maxframe_size: The maximum frame size | |
191 | * @retries: The retry count for the current state | |
f034260d | 192 | * @major_retries: The retry count for the entire PLOGI/PRLI state machine |
3a3b42bf RL |
193 | * @e_d_tov: Error detect timeout value (in msec) |
194 | * @r_a_tov: Resource allocation timeout value (in msec) | |
195 | * @rp_mutex: The mutex that protects the remote port | |
196 | * @retry_work: Handle for retries | |
197 | * @event_callback: Callback when READY, FAILED or LOGO states complete | |
96ad8464 | 198 | * @prli_count: Count of open PRLI sessions in providers |
42e90414 | 199 | * @rcu: Structure used for freeing in an RCU-safe manner |
42e9a92f | 200 | */ |
9e9d0452 | 201 | struct fc_rport_priv { |
3a3b42bf RL |
202 | struct fc_lport *local_port; |
203 | struct fc_rport *rport; | |
204 | struct kref kref; | |
205 | enum fc_rport_state rp_state; | |
f211fa51 | 206 | struct fc_rport_identifiers ids; |
3a3b42bf RL |
207 | u16 flags; |
208 | u16 max_seq; | |
209 | u16 disc_id; | |
210 | u16 maxframe_size; | |
211 | unsigned int retries; | |
f034260d | 212 | unsigned int major_retries; |
3a3b42bf RL |
213 | unsigned int e_d_tov; |
214 | unsigned int r_a_tov; | |
215 | struct mutex rp_mutex; | |
216 | struct delayed_work retry_work; | |
217 | enum fc_rport_event event; | |
218 | struct fc_rport_operations *ops; | |
219 | struct list_head peers; | |
220 | struct work_struct event_work; | |
221 | u32 supported_classes; | |
96ad8464 | 222 | u16 prli_count; |
42e90414 | 223 | struct rcu_head rcu; |
75a2792d BPG |
224 | u16 sp_features; |
225 | u8 spp_type; | |
226 | void (*lld_event_callback)(struct fc_lport *, | |
227 | struct fc_rport_priv *, | |
228 | enum fc_rport_event); | |
42e9a92f RL |
229 | }; |
230 | ||
3a3b42bf | 231 | /** |
1bd49b48 | 232 | * struct fc_stats - fc stats structure |
3a3b42bf RL |
233 | * @SecondsSinceLastReset: Seconds since the last reset |
234 | * @TxFrames: Number of transmitted frames | |
235 | * @TxWords: Number of transmitted words | |
236 | * @RxFrames: Number of received frames | |
237 | * @RxWords: Number of received words | |
238 | * @ErrorFrames: Number of received error frames | |
239 | * @DumpedFrames: Number of dumped frames | |
0f02a665 VD |
240 | * @FcpPktAllocFails: Number of fcp packet allocation failures |
241 | * @FcpPktAborts: Number of fcp packet aborts | |
242 | * @FcpFrameAllocFails: Number of fcp frame allocation failures | |
3a3b42bf RL |
243 | * @LinkFailureCount: Number of link failures |
244 | * @LossOfSignalCount: Number for signal losses | |
245 | * @InvalidTxWordCount: Number of invalid transmitted words | |
246 | * @InvalidCRCCount: Number of invalid CRCs | |
247 | * @InputRequests: Number of input requests | |
248 | * @OutputRequests: Number of output requests | |
249 | * @ControlRequests: Number of control requests | |
5f0e385f JE |
250 | * @InputBytes: Number of received bytes |
251 | * @OutputBytes: Number of transmitted bytes | |
6580bbd0 YZ |
252 | * @VLinkFailureCount: Number of virtual link failures |
253 | * @MissDiscAdvCount: Number of missing FIP discovery advertisement | |
42e9a92f | 254 | */ |
1bd49b48 | 255 | struct fc_stats { |
42e9a92f RL |
256 | u64 SecondsSinceLastReset; |
257 | u64 TxFrames; | |
258 | u64 TxWords; | |
259 | u64 RxFrames; | |
260 | u64 RxWords; | |
261 | u64 ErrorFrames; | |
262 | u64 DumpedFrames; | |
0f02a665 VD |
263 | u64 FcpPktAllocFails; |
264 | u64 FcpPktAborts; | |
265 | u64 FcpFrameAllocFails; | |
42e9a92f RL |
266 | u64 LinkFailureCount; |
267 | u64 LossOfSignalCount; | |
268 | u64 InvalidTxWordCount; | |
269 | u64 InvalidCRCCount; | |
270 | u64 InputRequests; | |
271 | u64 OutputRequests; | |
272 | u64 ControlRequests; | |
5f0e385f JE |
273 | u64 InputBytes; |
274 | u64 OutputBytes; | |
6580bbd0 YZ |
275 | u64 VLinkFailureCount; |
276 | u64 MissDiscAdvCount; | |
42e9a92f RL |
277 | }; |
278 | ||
3a3b42bf RL |
279 | /** |
280 | * struct fc_seq_els_data - ELS data used for passing ELS specific responses | |
3a3b42bf | 281 | * @reason: The reason for rejection |
25985edc | 282 | * @explan: The explanation of the rejection |
3a3b42bf RL |
283 | * |
284 | * Mainly used by the exchange manager layer. | |
42e9a92f RL |
285 | */ |
286 | struct fc_seq_els_data { | |
42e9a92f RL |
287 | enum fc_els_rjt_reason reason; |
288 | enum fc_els_rjt_explan explan; | |
289 | }; | |
290 | ||
3a3b42bf RL |
291 | /** |
292 | * struct fc_fcp_pkt - FCP request structure (one for each scsi_cmnd request) | |
293 | * @lp: The associated local port | |
294 | * @state: The state of the I/O | |
3a3b42bf RL |
295 | * @ref_cnt: Reference count |
296 | * @scsi_pkt_lock: Lock to protect the SCSI packet (must be taken before the | |
297 | * host_lock if both are to be held at the same time) | |
298 | * @cmd: The SCSI command (set and clear with the host_lock held) | |
299 | * @list: Tracks queued commands (accessed with the host_lock held) | |
300 | * @timer: The command timer | |
301 | * @tm_done: Completion indicator | |
302 | * @wait_for_comp: Indicator to wait for completion of the I/O (in jiffies) | |
3a3b42bf RL |
303 | * @data_len: The length of the data |
304 | * @cdb_cmd: The CDB command | |
305 | * @xfer_len: The transfer length | |
306 | * @xfer_ddp: Indicates if this transfer used DDP (XID of the exchange | |
307 | * will be set here if DDP was setup) | |
308 | * @xfer_contig_end: The offset into the buffer if the buffer is contiguous | |
309 | * (Tx and Rx) | |
310 | * @max_payload: The maximum payload size (in bytes) | |
311 | * @io_status: SCSI result (upper 24 bits) | |
312 | * @cdb_status: CDB status | |
313 | * @status_code: FCP I/O status | |
314 | * @scsi_comp_flags: Completion flags (bit 3 Underrun bit 2: overrun) | |
315 | * @req_flags: Request flags (bit 0: read bit:1 write) | |
316 | * @scsi_resid: SCSI residule length | |
317 | * @rport: The remote port that the SCSI command is targeted at | |
318 | * @seq_ptr: The sequence that will carry the SCSI command | |
319 | * @recov_retry: Number of recovery retries | |
320 | * @recov_seq: The sequence for REC or SRR | |
42e9a92f RL |
321 | */ |
322 | struct fc_fcp_pkt { | |
3a3b42bf | 323 | spinlock_t scsi_pkt_lock; |
ed26cfec VD |
324 | atomic_t ref_cnt; |
325 | ||
326 | /* SCSI command and data transfer information */ | |
327 | u32 data_len; | |
3a3b42bf RL |
328 | |
329 | /* SCSI I/O related information */ | |
330 | struct scsi_cmnd *cmd; | |
331 | struct list_head list; | |
332 | ||
ed26cfec VD |
333 | /* Housekeeping information */ |
334 | struct fc_lport *lp; | |
335 | u8 state; | |
3a3b42bf RL |
336 | |
337 | /* SCSI/FCP return status */ | |
3a3b42bf RL |
338 | u8 cdb_status; |
339 | u8 status_code; | |
340 | u8 scsi_comp_flags; | |
ed26cfec | 341 | u32 io_status; |
3a3b42bf RL |
342 | u32 req_flags; |
343 | u32 scsi_resid; | |
344 | ||
ed26cfec VD |
345 | /* Transport related veriables */ |
346 | size_t xfer_len; | |
347 | struct fcp_cmnd cdb_cmd; | |
348 | u32 xfer_contig_end; | |
349 | u16 max_payload; | |
350 | u16 xfer_ddp; | |
351 | ||
3a3b42bf RL |
352 | /* Associated structures */ |
353 | struct fc_rport *rport; | |
354 | struct fc_seq *seq_ptr; | |
355 | ||
ed26cfec VD |
356 | /* Timeout/error related information */ |
357 | struct timer_list timer; | |
ad3120cf HR |
358 | int wait_for_comp; |
359 | int timer_delay; | |
ed26cfec | 360 | u32 recov_retry; |
3a3b42bf | 361 | struct fc_seq *recov_seq; |
ed26cfec VD |
362 | struct completion tm_done; |
363 | } ____cacheline_aligned_in_smp; | |
42e9a92f RL |
364 | |
365 | /* | |
366 | * Structure and function definitions for managing Fibre Channel Exchanges | |
367 | * and Sequences | |
368 | * | |
369 | * fc_exch holds state for one exchange and links to its active sequence. | |
370 | * | |
371 | * fc_seq holds the state for an individual sequence. | |
372 | */ | |
373 | ||
374 | struct fc_exch_mgr; | |
96316099 | 375 | struct fc_exch_mgr_anchor; |
3a3b42bf | 376 | extern u16 fc_cpu_mask; /* cpu mask for possible cpus */ |
42e9a92f | 377 | |
3a3b42bf RL |
378 | /** |
379 | * struct fc_seq - FC sequence | |
380 | * @id: The sequence ID | |
381 | * @ssb_stat: Status flags for the sequence status block (SSB) | |
382 | * @cnt: Number of frames sent so far | |
383 | * @rec_data: FC-4 value for REC | |
42e9a92f RL |
384 | */ |
385 | struct fc_seq { | |
3a3b42bf RL |
386 | u8 id; |
387 | u16 ssb_stat; | |
388 | u16 cnt; | |
389 | u32 rec_data; | |
42e9a92f RL |
390 | }; |
391 | ||
392 | #define FC_EX_DONE (1 << 0) /* ep is completed */ | |
393 | #define FC_EX_RST_CLEANUP (1 << 1) /* reset is forcing completion */ | |
9ca1e182 | 394 | #define FC_EX_QUARANTINE (1 << 2) /* exch is quarantined */ |
42e9a92f | 395 | |
3a3b42bf RL |
396 | /** |
397 | * struct fc_exch - Fibre Channel Exchange | |
398 | * @em: Exchange manager | |
399 | * @pool: Exchange pool | |
400 | * @state: The exchange's state | |
401 | * @xid: The exchange ID | |
402 | * @ex_list: Handle used by the EM to track free exchanges | |
403 | * @ex_lock: Lock that protects the exchange | |
404 | * @ex_refcnt: Reference count | |
405 | * @timeout_work: Handle for timeout handler | |
406 | * @lp: The local port that this exchange is on | |
407 | * @oxid: Originator's exchange ID | |
408 | * @rxid: Responder's exchange ID | |
409 | * @oid: Originator's FCID | |
410 | * @sid: Source FCID | |
411 | * @did: Destination FCID | |
412 | * @esb_stat: ESB exchange status | |
413 | * @r_a_tov: Resouce allocation time out value (in msecs) | |
414 | * @seq_id: The next sequence ID to use | |
f60e12e9 | 415 | * @encaps: encapsulation information for lower-level driver |
3a3b42bf RL |
416 | * @f_ctl: F_CTL flags for the sequence |
417 | * @fh_type: The frame type | |
418 | * @class: The class of service | |
419 | * @seq: The sequence in use on this exchange | |
7030fd62 BVA |
420 | * @resp_active: Number of tasks that are concurrently executing @resp(). |
421 | * @resp_task: If @resp_active > 0, either the task executing @resp(), the | |
422 | * task that has been interrupted to execute the soft-IRQ | |
423 | * executing @resp() or NULL if more than one task is executing | |
424 | * @resp concurrently. | |
425 | * @resp_wq: Waitqueue for the tasks waiting on @resp_active. | |
3a3b42bf RL |
426 | * @resp: Callback for responses on this exchange |
427 | * @destructor: Called when destroying the exchange | |
428 | * @arg: Passed as a void pointer to the resp() callback | |
42e9a92f RL |
429 | * |
430 | * Locking notes: The ex_lock protects following items: | |
431 | * state, esb_stat, f_ctl, seq.ssb_stat | |
432 | * seq_id | |
433 | * sequence allocation | |
434 | */ | |
435 | struct fc_exch { | |
49a19889 VD |
436 | spinlock_t ex_lock; |
437 | atomic_t ex_refcnt; | |
438 | enum fc_class class; | |
3a3b42bf RL |
439 | struct fc_exch_mgr *em; |
440 | struct fc_exch_pool *pool; | |
3a3b42bf | 441 | struct list_head ex_list; |
3a3b42bf | 442 | struct fc_lport *lp; |
49a19889 VD |
443 | u32 esb_stat; |
444 | u8 state; | |
445 | u8 fh_type; | |
446 | u8 seq_id; | |
447 | u8 encaps; | |
448 | u16 xid; | |
3a3b42bf RL |
449 | u16 oxid; |
450 | u16 rxid; | |
451 | u32 oid; | |
452 | u32 sid; | |
453 | u32 did; | |
3a3b42bf | 454 | u32 r_a_tov; |
3a3b42bf | 455 | u32 f_ctl; |
49a19889 | 456 | struct fc_seq seq; |
7030fd62 BVA |
457 | int resp_active; |
458 | struct task_struct *resp_task; | |
459 | wait_queue_head_t resp_wq; | |
3a3b42bf RL |
460 | void (*resp)(struct fc_seq *, struct fc_frame *, void *); |
461 | void *arg; | |
3a3b42bf | 462 | void (*destructor)(struct fc_seq *, void *); |
49a19889 VD |
463 | struct delayed_work timeout_work; |
464 | } ____cacheline_aligned_in_smp; | |
42e9a92f RL |
465 | #define fc_seq_exch(sp) container_of(sp, struct fc_exch, seq) |
466 | ||
42e9a92f | 467 | |
3a3b42bf | 468 | struct libfc_function_template { |
42e9a92f RL |
469 | /* |
470 | * Interface to send a FC frame | |
42e9a92f | 471 | * |
0ae4d4ae | 472 | * STATUS: REQUIRED |
42e9a92f | 473 | */ |
3a3b42bf | 474 | int (*frame_send)(struct fc_lport *, struct fc_frame *); |
42e9a92f RL |
475 | |
476 | /* | |
0ae4d4ae RL |
477 | * Interface to send ELS/CT frames |
478 | * | |
479 | * STATUS: OPTIONAL | |
42e9a92f | 480 | */ |
3a3b42bf RL |
481 | struct fc_seq *(*elsct_send)(struct fc_lport *, u32 did, |
482 | struct fc_frame *, unsigned int op, | |
42e9a92f | 483 | void (*resp)(struct fc_seq *, |
3a3b42bf | 484 | struct fc_frame *, void *arg), |
42e9a92f | 485 | void *arg, u32 timer_msec); |
42e9a92f RL |
486 | |
487 | /* | |
488 | * Send the FC frame payload using a new exchange and sequence. | |
489 | * | |
42e9a92f RL |
490 | * The exchange response handler is set in this routine to resp() |
491 | * function pointer. It can be called in two scenarios: if a timeout | |
492 | * occurs or if a response frame is received for the exchange. The | |
493 | * fc_frame pointer in response handler will also indicate timeout | |
494 | * as error using IS_ERR related macros. | |
495 | * | |
496 | * The exchange destructor handler is also set in this routine. | |
497 | * The destructor handler is invoked by EM layer when exchange | |
498 | * is about to free, this can be used by caller to free its | |
499 | * resources along with exchange free. | |
500 | * | |
501 | * The arg is passed back to resp and destructor handler. | |
502 | * | |
503 | * The timeout value (in msec) for an exchange is set if non zero | |
504 | * timer_msec argument is specified. The timer is canceled when | |
505 | * it fires or when the exchange is done. The exchange timeout handler | |
506 | * is registered by EM layer. | |
0ae4d4ae RL |
507 | * |
508 | * STATUS: OPTIONAL | |
42e9a92f | 509 | */ |
3a3b42bf RL |
510 | struct fc_seq *(*exch_seq_send)(struct fc_lport *, struct fc_frame *, |
511 | void (*resp)(struct fc_seq *, | |
512 | struct fc_frame *, | |
513 | void *), | |
514 | void (*destructor)(struct fc_seq *, | |
515 | void *), | |
516 | void *, unsigned int timer_msec); | |
42e9a92f | 517 | |
b277d2aa YZ |
518 | /* |
519 | * Sets up the DDP context for a given exchange id on the given | |
520 | * scatterlist if LLD supports DDP for large receive. | |
521 | * | |
522 | * STATUS: OPTIONAL | |
523 | */ | |
3a3b42bf RL |
524 | int (*ddp_setup)(struct fc_lport *, u16, struct scatterlist *, |
525 | unsigned int); | |
b277d2aa YZ |
526 | /* |
527 | * Completes the DDP transfer and returns the length of data DDPed | |
528 | * for the given exchange id. | |
529 | * | |
530 | * STATUS: OPTIONAL | |
531 | */ | |
3a3b42bf | 532 | int (*ddp_done)(struct fc_lport *, u16); |
33dc362b YZ |
533 | /* |
534 | * Sets up the DDP context for a given exchange id on the given | |
1bd49b48 | 535 | * scatterlist if LLD supports DDP for target. |
33dc362b YZ |
536 | * |
537 | * STATUS: OPTIONAL | |
538 | */ | |
539 | int (*ddp_target)(struct fc_lport *, u16, struct scatterlist *, | |
540 | unsigned int); | |
b84056bf YZ |
541 | /* |
542 | * Allow LLD to fill its own Link Error Status Block | |
543 | * | |
544 | * STATUS: OPTIONAL | |
545 | */ | |
546 | void (*get_lesb)(struct fc_lport *, struct fc_els_lesb *lesb); | |
42e9a92f | 547 | /* |
0ae4d4ae RL |
548 | * Send a frame using an existing sequence and exchange. |
549 | * | |
550 | * STATUS: OPTIONAL | |
42e9a92f | 551 | */ |
3a3b42bf RL |
552 | int (*seq_send)(struct fc_lport *, struct fc_seq *, |
553 | struct fc_frame *); | |
42e9a92f | 554 | |
42e9a92f RL |
555 | /* |
556 | * Abort an exchange and sequence. Generally called because of a | |
557 | * exchange timeout or an abort from the upper layer. | |
558 | * | |
559 | * A timer_msec can be specified for abort timeout, if non-zero | |
560 | * timer_msec value is specified then exchange resp handler | |
561 | * will be called with timeout error if no response to abort. | |
0ae4d4ae RL |
562 | * |
563 | * STATUS: OPTIONAL | |
42e9a92f | 564 | */ |
3a3b42bf | 565 | int (*seq_exch_abort)(const struct fc_seq *, |
42e9a92f RL |
566 | unsigned int timer_msec); |
567 | ||
568 | /* | |
569 | * Indicate that an exchange/sequence tuple is complete and the memory | |
570 | * allocated for the related objects may be freed. | |
0ae4d4ae RL |
571 | * |
572 | * STATUS: OPTIONAL | |
42e9a92f | 573 | */ |
3a3b42bf | 574 | void (*exch_done)(struct fc_seq *); |
42e9a92f | 575 | |
42e9a92f RL |
576 | /* |
577 | * Start a new sequence on the same exchange/sequence tuple. | |
0ae4d4ae RL |
578 | * |
579 | * STATUS: OPTIONAL | |
42e9a92f | 580 | */ |
3a3b42bf | 581 | struct fc_seq *(*seq_start_next)(struct fc_seq *); |
42e9a92f | 582 | |
1a5c2d7e JE |
583 | /* |
584 | * Set a response handler for the exchange of the sequence. | |
585 | * | |
586 | * STATUS: OPTIONAL | |
587 | */ | |
588 | void (*seq_set_resp)(struct fc_seq *sp, | |
589 | void (*resp)(struct fc_seq *, struct fc_frame *, | |
590 | void *), | |
591 | void *arg); | |
592 | ||
239e8104 JE |
593 | /* |
594 | * Assign a sequence for an incoming request frame. | |
595 | * | |
596 | * STATUS: OPTIONAL | |
597 | */ | |
598 | struct fc_seq *(*seq_assign)(struct fc_lport *, struct fc_frame *); | |
599 | ||
62bdb645 JE |
600 | /* |
601 | * Release the reference on the sequence returned by seq_assign(). | |
602 | * | |
603 | * STATUS: OPTIONAL | |
604 | */ | |
605 | void (*seq_release)(struct fc_seq *); | |
606 | ||
42e9a92f RL |
607 | /* |
608 | * Reset an exchange manager, completing all sequences and exchanges. | |
609 | * If s_id is non-zero, reset only exchanges originating from that FID. | |
610 | * If d_id is non-zero, reset only exchanges sending to that FID. | |
0ae4d4ae RL |
611 | * |
612 | * STATUS: OPTIONAL | |
42e9a92f | 613 | */ |
3a3b42bf | 614 | void (*exch_mgr_reset)(struct fc_lport *, u32 s_id, u32 d_id); |
42e9a92f | 615 | |
0ae4d4ae RL |
616 | /* |
617 | * Flush the rport work queue. Generally used before shutdown. | |
618 | * | |
619 | * STATUS: OPTIONAL | |
42e9a92f | 620 | */ |
0ae4d4ae | 621 | void (*rport_flush_queue)(void); |
42e9a92f | 622 | |
093bb6a2 JE |
623 | /* |
624 | * Set the local port FC_ID. | |
625 | * | |
626 | * This may be provided by the LLD to allow it to be | |
627 | * notified when the local port is assigned a FC-ID. | |
628 | * | |
629 | * The frame, if non-NULL, is the incoming frame with the | |
630 | * FLOGI LS_ACC or FLOGI, and may contain the granted MAC | |
631 | * address for the LLD. The frame pointer may be NULL if | |
632 | * no MAC is associated with this assignment (LOGO or PLOGI). | |
633 | * | |
634 | * If FC_ID is non-zero, r_a_tov and e_d_tov must be valid. | |
635 | * | |
636 | * Note: this is called with the local port mutex held. | |
637 | * | |
638 | * STATUS: OPTIONAL | |
639 | */ | |
640 | void (*lport_set_port_id)(struct fc_lport *, u32 port_id, | |
641 | struct fc_frame *); | |
642 | ||
5101ff99 | 643 | /* |
9737e6a7 RL |
644 | * Create a remote port with a given port ID |
645 | * | |
646 | * STATUS: OPTIONAL | |
5101ff99 | 647 | */ |
9737e6a7 | 648 | struct fc_rport_priv *(*rport_create)(struct fc_lport *, u32); |
5101ff99 | 649 | |
42e9a92f RL |
650 | /* |
651 | * Initiates the RP state machine. It is called from the LP module. | |
652 | * This function will issue the following commands to the N_Port | |
653 | * identified by the FC ID provided. | |
654 | * | |
655 | * - PLOGI | |
656 | * - PRLI | |
657 | * - RTV | |
0ae4d4ae RL |
658 | * |
659 | * STATUS: OPTIONAL | |
42e9a92f | 660 | */ |
9fb9d328 | 661 | int (*rport_login)(struct fc_rport_priv *); |
42e9a92f RL |
662 | |
663 | /* | |
664 | * Logoff, and remove the rport from the transport if | |
665 | * it had been added. This will send a LOGO to the target. | |
0ae4d4ae RL |
666 | * |
667 | * STATUS: OPTIONAL | |
42e9a92f | 668 | */ |
9fb9d328 | 669 | int (*rport_logoff)(struct fc_rport_priv *); |
42e9a92f RL |
670 | |
671 | /* | |
25985edc | 672 | * Receive a request from a remote port. |
0ae4d4ae RL |
673 | * |
674 | * STATUS: OPTIONAL | |
42e9a92f | 675 | */ |
92261156 | 676 | void (*rport_recv_req)(struct fc_lport *, struct fc_frame *); |
42e9a92f | 677 | |
0ae4d4ae RL |
678 | /* |
679 | * lookup an rport by it's port ID. | |
680 | * | |
681 | * STATUS: OPTIONAL | |
42e9a92f | 682 | */ |
9fb9d328 | 683 | struct fc_rport_priv *(*rport_lookup)(const struct fc_lport *, u32); |
42e9a92f | 684 | |
f211fa51 JE |
685 | /* |
686 | * Destroy an rport after final kref_put(). | |
687 | * The argument is a pointer to the kref inside the fc_rport_priv. | |
688 | */ | |
689 | void (*rport_destroy)(struct kref *); | |
690 | ||
75a2792d BPG |
691 | /* |
692 | * Callback routine after the remote port is logged in | |
693 | * | |
694 | * STATUS: OPTIONAL | |
695 | */ | |
696 | void (*rport_event_callback)(struct fc_lport *, | |
697 | struct fc_rport_priv *, | |
698 | enum fc_rport_event); | |
699 | ||
42e9a92f RL |
700 | /* |
701 | * Send a fcp cmd from fsp pkt. | |
702 | * Called with the SCSI host lock unlocked and irqs disabled. | |
703 | * | |
704 | * The resp handler is called when FCP_RSP received. | |
705 | * | |
0ae4d4ae | 706 | * STATUS: OPTIONAL |
42e9a92f | 707 | */ |
3a3b42bf RL |
708 | int (*fcp_cmd_send)(struct fc_lport *, struct fc_fcp_pkt *, |
709 | void (*resp)(struct fc_seq *, struct fc_frame *, | |
710 | void *)); | |
42e9a92f RL |
711 | |
712 | /* | |
25985edc | 713 | * Cleanup the FCP layer, used during link down and reset |
0ae4d4ae RL |
714 | * |
715 | * STATUS: OPTIONAL | |
42e9a92f | 716 | */ |
3a3b42bf | 717 | void (*fcp_cleanup)(struct fc_lport *); |
42e9a92f RL |
718 | |
719 | /* | |
720 | * Abort all I/O on a local port | |
0ae4d4ae RL |
721 | * |
722 | * STATUS: OPTIONAL | |
42e9a92f | 723 | */ |
3a3b42bf | 724 | void (*fcp_abort_io)(struct fc_lport *); |
42e9a92f | 725 | |
0ae4d4ae RL |
726 | /* |
727 | * Receive a request for the discovery layer. | |
728 | * | |
729 | * STATUS: OPTIONAL | |
42e9a92f | 730 | */ |
92261156 | 731 | void (*disc_recv_req)(struct fc_lport *, struct fc_frame *); |
42e9a92f RL |
732 | |
733 | /* | |
734 | * Start discovery for a local port. | |
0ae4d4ae RL |
735 | * |
736 | * STATUS: OPTIONAL | |
42e9a92f RL |
737 | */ |
738 | void (*disc_start)(void (*disc_callback)(struct fc_lport *, | |
739 | enum fc_disc_event), | |
740 | struct fc_lport *); | |
741 | ||
742 | /* | |
743 | * Stop discovery for a given lport. This will remove | |
744 | * all discovered rports | |
0ae4d4ae RL |
745 | * |
746 | * STATUS: OPTIONAL | |
42e9a92f RL |
747 | */ |
748 | void (*disc_stop) (struct fc_lport *); | |
749 | ||
750 | /* | |
751 | * Stop discovery for a given lport. This will block | |
752 | * until all discovered rports are deleted from the | |
753 | * FC transport class | |
0ae4d4ae RL |
754 | * |
755 | * STATUS: OPTIONAL | |
42e9a92f RL |
756 | */ |
757 | void (*disc_stop_final) (struct fc_lport *); | |
758 | }; | |
759 | ||
3a3b42bf RL |
760 | /** |
761 | * struct fc_disc - Discovery context | |
762 | * @retry_count: Number of retries | |
763 | * @pending: 1 if discovery is pending, 0 if not | |
c531b9b4 | 764 | * @requested: 1 if discovery has been requested, 0 if not |
3a3b42bf RL |
765 | * @seq_count: Number of sequences used for discovery |
766 | * @buf_len: Length of the discovery buffer | |
767 | * @disc_id: Discovery ID | |
768 | * @rports: List of discovered remote ports | |
0685230c | 769 | * @priv: Private pointer for use by discovery code |
3a3b42bf RL |
770 | * @disc_mutex: Mutex that protects the discovery context |
771 | * @partial_buf: Partial name buffer (if names are returned | |
772 | * in multiple frames) | |
773 | * @disc_work: handle for delayed work context | |
774 | * @disc_callback: Callback routine called when discovery completes | |
775 | */ | |
42e9a92f | 776 | struct fc_disc { |
3a3b42bf RL |
777 | unsigned char retry_count; |
778 | unsigned char pending; | |
779 | unsigned char requested; | |
780 | unsigned short seq_count; | |
781 | unsigned char buf_len; | |
782 | u16 disc_id; | |
783 | ||
784 | struct list_head rports; | |
0685230c | 785 | void *priv; |
3a3b42bf RL |
786 | struct mutex disc_mutex; |
787 | struct fc_gpn_ft_resp partial_buf; | |
788 | struct delayed_work disc_work; | |
42e9a92f RL |
789 | |
790 | void (*disc_callback)(struct fc_lport *, | |
791 | enum fc_disc_event); | |
42e9a92f RL |
792 | }; |
793 | ||
70d53b04 JE |
794 | /* |
795 | * Local port notifier and events. | |
796 | */ | |
797 | extern struct blocking_notifier_head fc_lport_notifier_head; | |
798 | enum fc_lport_event { | |
799 | FC_LPORT_EV_ADD, | |
800 | FC_LPORT_EV_DEL, | |
801 | }; | |
802 | ||
3a3b42bf RL |
803 | /** |
804 | * struct fc_lport - Local port | |
805 | * @host: The SCSI host associated with a local port | |
806 | * @ema_list: Exchange manager anchor list | |
807 | * @dns_rdata: The directory server remote port | |
d78c317f | 808 | * @ms_rdata: The management server remote port |
3a3b42bf RL |
809 | * @ptp_rdata: Point to point remote port |
810 | * @scsi_priv: FCP layer internal data | |
811 | * @disc: Discovery context | |
812 | * @vports: Child vports if N_Port | |
813 | * @vport: Parent vport if VN_Port | |
814 | * @tt: Libfc function template | |
815 | * @link_up: Link state (1 = link up, 0 = link down) | |
816 | * @qfull: Queue state (1 queue is full, 0 queue is not full) | |
817 | * @state: Identifies the state | |
818 | * @boot_time: Timestamp indicating when the local port came online | |
819 | * @host_stats: SCSI host statistics | |
1bd49b48 | 820 | * @stats: FC local port stats (TODO separate libfc LLD stats) |
3a3b42bf | 821 | * @retry_count: Number of retries in the current state |
7b2787ec | 822 | * @port_id: FC Port ID |
3a3b42bf RL |
823 | * @wwpn: World Wide Port Name |
824 | * @wwnn: World Wide Node Name | |
825 | * @service_params: Common service parameters | |
826 | * @e_d_tov: Error detection timeout value | |
827 | * @r_a_tov: Resouce allocation timeout value | |
828 | * @rnid_gen: RNID information | |
829 | * @sg_supp: Indicates if scatter gather is supported | |
830 | * @seq_offload: Indicates if sequence offload is supported | |
831 | * @crc_offload: Indicates if CRC offload is supported | |
832 | * @lro_enabled: Indicates if large receive offload is supported | |
833 | * @does_npiv: Supports multiple vports | |
834 | * @npiv_enabled: Switch/fabric allows NPIV | |
835 | * @mfs: The maximum Fibre Channel payload size | |
836 | * @max_retry_count: The maximum retry attempts | |
837 | * @max_rport_retry_count: The maximum remote port retry attempts | |
f90377ab | 838 | * @rport_priv_size: Size needed by driver after struct fc_rport_priv |
3a3b42bf RL |
839 | * @lro_xid: The maximum XID for LRO |
840 | * @lso_max: The maximum large offload send size | |
841 | * @fcts: FC-4 type mask | |
842 | * @lp_mutex: Mutex to protect the local port | |
70d53b04 | 843 | * @list: Linkage on list of vport peers |
3a3b42bf | 844 | * @retry_work: Handle to local port for delayed retry context |
baf9fdf0 | 845 | * @prov: Pointers available for use by passive FC-4 providers |
70d53b04 | 846 | * @lport_list: Linkage on module-wide list of local ports |
3a3b42bf | 847 | */ |
42e9a92f | 848 | struct fc_lport { |
42e9a92f | 849 | /* Associations */ |
3a3b42bf RL |
850 | struct Scsi_Host *host; |
851 | struct list_head ema_list; | |
852 | struct fc_rport_priv *dns_rdata; | |
d78c317f | 853 | struct fc_rport_priv *ms_rdata; |
3a3b42bf RL |
854 | struct fc_rport_priv *ptp_rdata; |
855 | void *scsi_priv; | |
856 | struct fc_disc disc; | |
857 | ||
858 | /* Virtual port information */ | |
859 | struct list_head vports; | |
860 | struct fc_vport *vport; | |
42e9a92f RL |
861 | |
862 | /* Operational Information */ | |
863 | struct libfc_function_template tt; | |
3a3b42bf RL |
864 | u8 link_up; |
865 | u8 qfull; | |
9a6cf881 | 866 | u16 vlan; |
3a3b42bf RL |
867 | enum fc_lport_state state; |
868 | unsigned long boot_time; | |
869 | struct fc_host_statistics host_stats; | |
1bd49b48 | 870 | struct fc_stats __percpu *stats; |
3a3b42bf RL |
871 | u8 retry_count; |
872 | ||
873 | /* Fabric information */ | |
7b2787ec | 874 | u32 port_id; |
3a3b42bf RL |
875 | u64 wwpn; |
876 | u64 wwnn; | |
877 | unsigned int service_params; | |
878 | unsigned int e_d_tov; | |
879 | unsigned int r_a_tov; | |
880 | struct fc_els_rnid_gen rnid_gen; | |
42e9a92f RL |
881 | |
882 | /* Capabilities */ | |
3a3b42bf RL |
883 | u32 sg_supp:1; |
884 | u32 seq_offload:1; | |
885 | u32 crc_offload:1; | |
886 | u32 lro_enabled:1; | |
887 | u32 does_npiv:1; | |
888 | u32 npiv_enabled:1; | |
3726f358 | 889 | u32 point_to_multipoint:1; |
d78c317f | 890 | u32 fdmi_enabled:1; |
3a3b42bf RL |
891 | u32 mfs; |
892 | u8 max_retry_count; | |
893 | u8 max_rport_retry_count; | |
f90377ab | 894 | u16 rport_priv_size; |
3a3b42bf RL |
895 | u16 link_speed; |
896 | u16 link_supported_speeds; | |
897 | u16 lro_xid; | |
898 | unsigned int lso_max; | |
899 | struct fc_ns_fts fcts; | |
42e9a92f RL |
900 | |
901 | /* Miscellaneous */ | |
3a3b42bf RL |
902 | struct mutex lp_mutex; |
903 | struct list_head list; | |
904 | struct delayed_work retry_work; | |
baf9fdf0 | 905 | void *prov[FC_FC4_PROV_SIZE]; |
70d53b04 | 906 | struct list_head lport_list; |
42e9a92f RL |
907 | }; |
908 | ||
96ad8464 JE |
909 | /** |
910 | * struct fc4_prov - FC-4 provider registration | |
911 | * @prli: Handler for incoming PRLI | |
912 | * @prlo: Handler for session reset | |
913 | * @recv: Handler for incoming request | |
914 | * @module: Pointer to module. May be NULL. | |
915 | */ | |
916 | struct fc4_prov { | |
917 | int (*prli)(struct fc_rport_priv *, u32 spp_len, | |
918 | const struct fc_els_spp *spp_in, | |
919 | struct fc_els_spp *spp_out); | |
920 | void (*prlo)(struct fc_rport_priv *); | |
921 | void (*recv)(struct fc_lport *, struct fc_frame *); | |
922 | struct module *module; | |
923 | }; | |
924 | ||
925 | /* | |
926 | * Register FC-4 provider with libfc. | |
927 | */ | |
928 | int fc_fc4_register_provider(enum fc_fh_type type, struct fc4_prov *); | |
929 | void fc_fc4_deregister_provider(enum fc_fh_type type, struct fc4_prov *); | |
930 | ||
34f42a07 | 931 | /* |
42e9a92f RL |
932 | * FC_LPORT HELPER FUNCTIONS |
933 | *****************************/ | |
3a3b42bf RL |
934 | |
935 | /** | |
936 | * fc_lport_test_ready() - Determine if a local port is in the READY state | |
937 | * @lport: The local port to test | |
938 | */ | |
939 | static inline int fc_lport_test_ready(struct fc_lport *lport) | |
42e9a92f | 940 | { |
3a3b42bf | 941 | return lport->state == LPORT_ST_READY; |
42e9a92f RL |
942 | } |
943 | ||
3a3b42bf RL |
944 | /** |
945 | * fc_set_wwnn() - Set the World Wide Node Name of a local port | |
946 | * @lport: The local port whose WWNN is to be set | |
947 | * @wwnn: The new WWNN | |
948 | */ | |
949 | static inline void fc_set_wwnn(struct fc_lport *lport, u64 wwnn) | |
42e9a92f | 950 | { |
3a3b42bf | 951 | lport->wwnn = wwnn; |
42e9a92f RL |
952 | } |
953 | ||
3a3b42bf RL |
954 | /** |
955 | * fc_set_wwpn() - Set the World Wide Port Name of a local port | |
956 | * @lport: The local port whose WWPN is to be set | |
957 | * @wwnn: The new WWPN | |
958 | */ | |
959 | static inline void fc_set_wwpn(struct fc_lport *lport, u64 wwnn) | |
42e9a92f | 960 | { |
3a3b42bf | 961 | lport->wwpn = wwnn; |
42e9a92f RL |
962 | } |
963 | ||
3a3b42bf RL |
964 | /** |
965 | * fc_lport_state_enter() - Change a local port's state | |
966 | * @lport: The local port whose state is to change | |
967 | * @state: The new state | |
968 | */ | |
969 | static inline void fc_lport_state_enter(struct fc_lport *lport, | |
42e9a92f RL |
970 | enum fc_lport_state state) |
971 | { | |
3a3b42bf RL |
972 | if (state != lport->state) |
973 | lport->retry_count = 0; | |
974 | lport->state = state; | |
42e9a92f RL |
975 | } |
976 | ||
3a3b42bf RL |
977 | /** |
978 | * fc_lport_init_stats() - Allocate per-CPU statistics for a local port | |
979 | * @lport: The local port whose statistics are to be initialized | |
980 | */ | |
981 | static inline int fc_lport_init_stats(struct fc_lport *lport) | |
582b45bc | 982 | { |
1bd49b48 VD |
983 | lport->stats = alloc_percpu(struct fc_stats); |
984 | if (!lport->stats) | |
582b45bc RL |
985 | return -ENOMEM; |
986 | return 0; | |
987 | } | |
988 | ||
3a3b42bf RL |
989 | /** |
990 | * fc_lport_free_stats() - Free memory for a local port's statistics | |
991 | * @lport: The local port whose statistics are to be freed | |
992 | */ | |
993 | static inline void fc_lport_free_stats(struct fc_lport *lport) | |
582b45bc | 994 | { |
1bd49b48 | 995 | free_percpu(lport->stats); |
582b45bc RL |
996 | } |
997 | ||
3a3b42bf RL |
998 | /** |
999 | * lport_priv() - Return the private data from a local port | |
1000 | * @lport: The local port whose private data is to be retreived | |
1001 | */ | |
1002 | static inline void *lport_priv(const struct fc_lport *lport) | |
a0a25da2 | 1003 | { |
3a3b42bf | 1004 | return (void *)(lport + 1); |
a0a25da2 VD |
1005 | } |
1006 | ||
1007 | /** | |
3a3b42bf RL |
1008 | * libfc_host_alloc() - Allocate a Scsi_Host with room for a local port and |
1009 | * LLD private data | |
1010 | * @sht: The SCSI host template | |
1011 | * @priv_size: Size of private data | |
a0a25da2 | 1012 | * |
86221969 | 1013 | * Returns: libfc lport |
a0a25da2 | 1014 | */ |
86221969 | 1015 | static inline struct fc_lport * |
a0a25da2 VD |
1016 | libfc_host_alloc(struct scsi_host_template *sht, int priv_size) |
1017 | { | |
86221969 CL |
1018 | struct fc_lport *lport; |
1019 | struct Scsi_Host *shost; | |
1020 | ||
1021 | shost = scsi_host_alloc(sht, sizeof(*lport) + priv_size); | |
1022 | if (!shost) | |
1023 | return NULL; | |
1024 | lport = shost_priv(shost); | |
1025 | lport->host = shost; | |
1026 | INIT_LIST_HEAD(&lport->ema_list); | |
174e1ebf | 1027 | INIT_LIST_HEAD(&lport->vports); |
86221969 | 1028 | return lport; |
a0a25da2 | 1029 | } |
42e9a92f | 1030 | |
34f42a07 | 1031 | /* |
3a3b42bf | 1032 | * FC_FCP HELPER FUNCTIONS |
42e9a92f | 1033 | *****************************/ |
3a3b42bf RL |
1034 | static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp) |
1035 | { | |
1036 | if (fsp && fsp->cmd) | |
1037 | return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE; | |
1038 | return false; | |
1039 | } | |
42e9a92f RL |
1040 | |
1041 | /* | |
3a3b42bf RL |
1042 | * LOCAL PORT LAYER |
1043 | *****************************/ | |
1044 | int fc_lport_init(struct fc_lport *); | |
1045 | int fc_lport_destroy(struct fc_lport *); | |
1046 | int fc_fabric_logoff(struct fc_lport *); | |
1047 | int fc_fabric_login(struct fc_lport *); | |
8faecddb | 1048 | void __fc_linkup(struct fc_lport *); |
42e9a92f | 1049 | void fc_linkup(struct fc_lport *); |
8faecddb | 1050 | void __fc_linkdown(struct fc_lport *); |
42e9a92f | 1051 | void fc_linkdown(struct fc_lport *); |
3a3b42bf RL |
1052 | void fc_vport_setlink(struct fc_lport *); |
1053 | void fc_vports_linkchange(struct fc_lport *); | |
42e9a92f | 1054 | int fc_lport_config(struct fc_lport *); |
42e9a92f | 1055 | int fc_lport_reset(struct fc_lport *); |
c5cb444c | 1056 | void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp); |
3a3b42bf RL |
1057 | int fc_set_mfs(struct fc_lport *, u32 mfs); |
1058 | struct fc_lport *libfc_vport_create(struct fc_vport *, int privsize); | |
1059 | struct fc_lport *fc_vport_id_lookup(struct fc_lport *, u32 port_id); | |
1060 | int fc_lport_bsg_request(struct fc_bsg_job *); | |
3726f358 | 1061 | void fc_lport_set_local_id(struct fc_lport *, u32 port_id); |
70d53b04 | 1062 | void fc_lport_iterate(void (*func)(struct fc_lport *, void *), void *); |
a51ab396 | 1063 | |
34f42a07 | 1064 | /* |
42e9a92f RL |
1065 | * REMOTE PORT LAYER |
1066 | *****************************/ | |
3a3b42bf RL |
1067 | int fc_rport_init(struct fc_lport *); |
1068 | void fc_rport_terminate_io(struct fc_rport *); | |
42e9a92f | 1069 | |
34f42a07 | 1070 | /* |
42e9a92f RL |
1071 | * DISCOVERY LAYER |
1072 | *****************************/ | |
0807619d RL |
1073 | void fc_disc_init(struct fc_lport *); |
1074 | void fc_disc_config(struct fc_lport *, void *); | |
42e9a92f | 1075 | |
0685230c JE |
1076 | static inline struct fc_lport *fc_disc_lport(struct fc_disc *disc) |
1077 | { | |
1078 | return container_of(disc, struct fc_lport, disc); | |
1079 | } | |
1080 | ||
34f42a07 | 1081 | /* |
3a3b42bf | 1082 | * FCP LAYER |
42e9a92f | 1083 | *****************************/ |
42e9a92f | 1084 | int fc_fcp_init(struct fc_lport *); |
3a3b42bf | 1085 | void fc_fcp_destroy(struct fc_lport *); |
42e9a92f RL |
1086 | |
1087 | /* | |
3a3b42bf RL |
1088 | * SCSI INTERACTION LAYER |
1089 | *****************************/ | |
f281233d | 1090 | int fc_queuecommand(struct Scsi_Host *, struct scsi_cmnd *); |
3a3b42bf RL |
1091 | int fc_eh_abort(struct scsi_cmnd *); |
1092 | int fc_eh_device_reset(struct scsi_cmnd *); | |
1093 | int fc_eh_host_reset(struct scsi_cmnd *); | |
1094 | int fc_slave_alloc(struct scsi_device *); | |
42e9a92f | 1095 | |
34f42a07 | 1096 | /* |
42e9a92f RL |
1097 | * ELS/CT interface |
1098 | *****************************/ | |
3a3b42bf RL |
1099 | int fc_elsct_init(struct fc_lport *); |
1100 | struct fc_seq *fc_elsct_send(struct fc_lport *, u32 did, | |
1101 | struct fc_frame *, | |
11b56188 CL |
1102 | unsigned int op, |
1103 | void (*resp)(struct fc_seq *, | |
3a3b42bf | 1104 | struct fc_frame *, |
11b56188 CL |
1105 | void *arg), |
1106 | void *arg, u32 timer_msec); | |
1107 | void fc_lport_flogi_resp(struct fc_seq *, struct fc_frame *, void *); | |
1108 | void fc_lport_logo_resp(struct fc_seq *, struct fc_frame *, void *); | |
24f089e2 JE |
1109 | void fc_fill_reply_hdr(struct fc_frame *, const struct fc_frame *, |
1110 | enum fc_rctl, u32 parm_offset); | |
1111 | void fc_fill_hdr(struct fc_frame *, const struct fc_frame *, | |
1112 | enum fc_rctl, u32 f_ctl, u16 seq_cnt, u32 parm_offset); | |
42e9a92f RL |
1113 | |
1114 | ||
34f42a07 | 1115 | /* |
42e9a92f RL |
1116 | * EXCHANGE MANAGER LAYER |
1117 | *****************************/ | |
3a3b42bf | 1118 | int fc_exch_init(struct fc_lport *); |
4e5fae7a | 1119 | void fc_exch_update_stats(struct fc_lport *lport); |
7ab24dd1 HR |
1120 | void fc_seq_els_rsp_send(struct fc_frame *, enum fc_els_cmd, |
1121 | struct fc_seq_els_data *); | |
3a3b42bf RL |
1122 | struct fc_exch_mgr_anchor *fc_exch_mgr_add(struct fc_lport *, |
1123 | struct fc_exch_mgr *, | |
96316099 | 1124 | bool (*match)(struct fc_frame *)); |
3a3b42bf | 1125 | void fc_exch_mgr_del(struct fc_exch_mgr_anchor *); |
174e1ebf | 1126 | int fc_exch_mgr_list_clone(struct fc_lport *src, struct fc_lport *dst); |
3a3b42bf RL |
1127 | struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *, enum fc_class class, |
1128 | u16 min_xid, u16 max_xid, | |
52ff878c | 1129 | bool (*match)(struct fc_frame *)); |
3a3b42bf RL |
1130 | void fc_exch_mgr_free(struct fc_lport *); |
1131 | void fc_exch_recv(struct fc_lport *, struct fc_frame *); | |
1f6ff364 | 1132 | void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id); |
42e9a92f RL |
1133 | |
1134 | /* | |
1135 | * Functions for fc_functions_template | |
1136 | */ | |
3a3b42bf | 1137 | void fc_get_host_speed(struct Scsi_Host *); |
3a3b42bf RL |
1138 | void fc_get_host_port_state(struct Scsi_Host *); |
1139 | void fc_set_rport_loss_tmo(struct fc_rport *, u32 timeout); | |
42e9a92f RL |
1140 | struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *); |
1141 | ||
42e9a92f | 1142 | #endif /* _LIBFC_H_ */ |